docs: def get_remembered_identity(self, subject_context):
          """
          Using the specified subject context map intended to build a ``Subject``
          instance, returns any previously remembered identifiers for the subject
          for automatic identity association (aka 'Remember Me').
          """
          rmm = self.remember_me_manager
          if rmm is not None:
              try:
                  return rmm.get_remembered_identifiers(subject_context)
              except Exception as ex:
                  msg = ("Delegate RememberMeManager instance of type [" +
                         rmm.__class__.__name__ + "] raised an exception during "
                         "get_remembered_identifiers().")
                  logger.warning(msg, exc_info=True)
          return None